Two-stage fixed-bed gasifier with selectable middle gas off-take

Details Two-stage fixed-bed gasifier with selectable middle gas off-take Two-stage fixed-bed gasifier with selectable middle gas off-take

1991-05-08

1992-08-18

Kratz, Peter

Gas: heating and illuminating

Generators

Cupola

48 77, 48 851, C01J 322, C01J 382

Patent

active

051395355

ABSTRACT:
A two-stage fixed bed coal gasifier wherein an annular region is in registry with a gasification zone underlying a devolatilization zone for extracting a side stream of high temperature substantially tar-free gas from the gasifier. A vertically displaceable skirt means is positioned within the gasifier to define the lower portion of the annular region so that vertical displacement of the skirt means positions the inlet into the annular region in a selected location within or in close proximity to the gasification zone for providing a positive control over the composition of the side stream gas.

REFERENCES:
patent: 3454382 (1969-07-01), Hamilton
patent: 4340463 (1982-07-01), Harak
patent: 4344772 (1982-08-01), Pillard
patent: 4456455 (1984-06-01), Shvebotham
patent: 4517165 (1985-05-01), Moriarty
patent: 4578175 (1986-03-01), Gorin
patent: 4725350 (1988-02-01), Smith
patent: 4758331 (1988-07-01), Kruse et al.
patent: 4842719 (1989-01-01), MacArthur et al.
Handbook of Gasifiers and Gas Treatment Systems, Raj D. Parekh, WD-TR-82/008-010 Sep. 1988, pp. 2A.24-2A.41.

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